Five Star Foam rates as the absolute finest foaming cleaner in the industry! 5 Star Foam is for use on interior smudge marks, nicotine stains, oily fingerprints and food stains. On exteriors, 5 Star Foam will effectively clean carbon exhaust, oil and bugs.5 Star Foam was designed specially for hard to remove grease and soil unaffected by other cleaners. Its clinging foam permits long-lasting contact with irregular, as well as plain, surfaces to be cleaned.